When solutions of sodium carbonate and calcium chloride are combined, calcium carbonate precipitate is produced, along with aqueous sodium chloride. write a balanced equation for the reaction, including states of matter.

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?